Textured metastable VO{sub 2} (B) thin films on SrTiO{sub 3} substrates with significantly enhanced conductivity

Textured metastable VO{sub 2} (B) thin films with a layered structure were grown on SrTiO{sub 3} (001) by pulsed laser deposition. The X-ray diffraction and transmission electron microscopy results indicate that VO{sub 2} (B) films exhibit c-axis out-of-plane, while the films have 4 possible in-plan...

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Bibliographic Details
Published in:Applied physics letters 2014-02, Vol.104 (7)
Main Authors: Chen, Aiping, Center for Integrated Nanotechnologies, Bi, Zhenxing, Jia, Quanxi, Zhang, Wenrui, Jian, Jie, Wang, Haiyan
Format: Article
Language:English
Subjects:
CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY
CRYSTAL STRUCTURE
ELECTRIC CONDUCTIVITY
ENERGY BEAM DEPOSITION
LASER RADIATION
PULSED IRRADIATION
STRONTIUM TITANATES
SUBSTRATES
TEXTURE
THIN FILMS
TRANSMISSION ELECTRON MICROSCOPY
VANADIUM OXIDES
X-RAY DIFFRACTION
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Summary:Textured metastable VO{sub 2} (B) thin films with a layered structure were grown on SrTiO{sub 3} (001) by pulsed laser deposition. The X-ray diffraction and transmission electron microscopy results indicate that VO{sub 2} (B) films exhibit c-axis out-of-plane, while the films have 4 possible in-plane matching relations. In addition, a small amount of VO{sub 2} (M) phase can co-grow in the VO{sub 2} (B) phase when the film thickness exceeds a threshold. The thick VO{sub 2} films on STO exhibit a sharp metal-insulator transition with an increase of electrical conductivity in two orders of magnitude. This study may provide an alternative approach to enhance the performance of insulating VO{sub 2} (B) based batteries with increased electrical conductivity by incorporating VO{sub 2} (M) phase in the VO{sub 2} (B) phase layered network.
ISSN:0003-6951
1077-3118
DOI:10.1063/1.4865898